How do I restrict my webpages on users.aber.ac.uk, so only users on the aber network can see them?

You do this by creating an .htaccess file:

• Open a terminal session (How do I do that?) and log-on to the account you are working with
• Change directory (use the command cd directoryname substituting the name of your folder) until you are in the directory you wish to protect. This should be somewhere within the public_html folder on your public filestore.
• Open a text editor by typing pico
• Enter the following information into pico:
  order deny,allow
  deny from all
  allow from .aber.ac.uk
  
• Save the file with the name .htaccess by pressing Ctrl+O and entering the file name .htaccess
• Set the correct permissions on this folder (How do I do that?)